The graphing calculator can be very useful for
"checking" your
work and for determining if your multiple choice
answers are correct.
This page will address numerical style problems.

1.

Determine numerical equivalents.

The calculator can be
easily used
to solve multiple choice style problems where numerical equivalents
are needed. Find a decimal answer to the
problem and then check each answer to see which answer matches your
decimal.

The expression
is equivalent to
(1)
(2)

(3)
(4)

Hint:Get in the habit of CLOSING parentheses. This habit will be
most beneficial when working with longer problems.

2.

Be
careful when comparing inequalities.

Calculators (and computers)
do not evaluate "sandwich" expressions written in the form 3 < x < 10
as you might expect.
They will only evaluate the first condition
(3 < x). To evaluate
the entire expression, you will need to "tell" the calculator to also
use the second expression by using
the word "and". Find
"and" in the CATALOG or under the
TEST menu → LOGIC.
(3 < x < 10 must be entered
as 3 < x and x < 10)

If the relationship
is true,
then
t could be
(1)
(2) 0

(3) (4) 4

The numerical choices have been substituted into the inequality
expression. If the answer is 0, the expression is FALSE.
If the answer is 1, the expression is TRUE.
This is called a Boolean test.